JB

Most popular questions and responses by JB
1. physics

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 1.99 102 m along a circular arc. How far along a circular arc is an astronaut in

2. statistics

about 13% of the population is nervous around strangers. If 2 people are randomally seclected, what is the probability that both are nervous around strangers?

3. chemistry

An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.

4. Algebra

A total of 475 tickets were sold for the school play. There were 75 fewer student tickets sold than adult tickets. How many adult tickets were sold?

5. Math

A baseball player hits a ball up in the air with an upward velocity of 18 ft/sec. The equation that gives the height of the ball at any time "t" is h(t) = -8t(t) + 18t +5. How long did it take for the ball to hit the ground? Sorry I don't know how to type

6. College Physics

A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane

7. math

Prize winners for a giveaway program are to be determined as follows: Envelopes for the first 500 entries will be numbered 1 through 500 and laid on a long table. The first official will walk along the table, opening all the envelopes. The second official

8. English

“Nature is bountiful, which is why logging should be strictly regulated.” Which logical fallacy is illustrated in this sentence? A. Ad hominem B. Non sequitur C. Post hoc ergo propter hoc D. Red herring

9. math

A mathematics teacher wishes to use groups of 5 and/or 7 students for a class assignment. When she tries to make assignments she notices that it cannot be done with the number of students she has. However, if the number of students were any larger, the

10. chem

Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J

11. math

What is the shortest length of cable that can be cut into either a whole number of 18-ft pieces or a whole number of 30-ft pieces?

12. Math

jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

13. Rational Zeros

List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial and factor f(x)=2x^4+19x^3+37x^2-55x-75

14. College Physics

A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

15. Math

jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

16. math

Sarah bought 2 boxes of pencils. There were 58 pencils in each box. In the first box, 23 of the pencils were red, 18 were blue, and the rest were yellow.

17. precalc

Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.) log2(x + 17) − log2(x − 2) = 1 2 is the base for the log.

18. public speaking

Demographics is important to know your: A. speech. B. topic. C. audience. D. location of speaking event.

19. physics

A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of the velocity of this ball against time. where does the velocity change direction? Explain?

20. Living Environment

having a hard time finding this information on google and i really need help for some questions. What are 3 abiotic factors that influence the: Highlands of Ethiopia Patagonia The Rockies Pakistan and the Himalayas Forests of Eastern China

21. physics

A 58.2 g object is attached to a horizontal spring with a spring constant of 11.8 N/m and released from rest with an amplitude of 24.4 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?

22. precalculus

which conic section is this the equation for? 3x^2 - 9x + 2y^2 = 15

23. College Algebra

Verify the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x Graph the functions. f(x)=6/(1-x) g(x)=(1-6/x)

24. Functions/End behavior

f(x)=x^2(x^2-2)(x+2) Determine the end behavior, find the power function that the graph of f resembles for large values of |x| Find the maximum number of turning points

25. science

Can someone explain to me using a formula, why an increase in carbon dioxide makes the blood more acidic.

26. bio

the systemtic system of the heart sends oxygenated blood and nutrients to all body cells. If the questions were does it send oxygenated blood and nutrients to all body tissue would the answer be yes or no. cells make tissues so would it be yes?

27. precalculus

the vertex of y^2 - 8y + 24 = x is... (9,3) (24,0) (8,4) (4,8) or none of these

28. physics

It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall

29. Chemistry

Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of

30. Medical

It was discovered that a medical assistant discussed the medical condition of a high-profile individual in public. This resulted in the condition becoming publicized information. What were the influential factors in this situation for the medical

31. Trig

(Tan^2 x) - 2 tan x - 3 / tan x + 1

32. AP Physics

A car traveling in a straight line has a velocity of 3.24 m/s at some instant. After 3.28 s, its velocity is 8.18 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2 .

33. English

Which sentence most clearly exhibits bias? A. The professor’s points appear to be based on outdated research. B. If my argument is true, Blake’s argument is clearly false. C. Few would disagree that poor people are incapable of rational thinking. D.

34. Chemistry

what are the pH and the pOH of 0.125M HCIO4?

35. Math

A stone is thrown skyward from the top of building. The distance in feet between the stone and the ground in 't' seconds is given by the function h (t) = -16t(t) -4t+ 442. How long after the stone is thrown is it 430 feet from the ground? Sorry I don't

36. math

if m set of 22 mathematics teachers and p is the set of 25 physics teachers and if 2 teachers both mathematics and physics, how many elements has MUP.

37. precalc

Solve the equation. (Enter your answers as a comma-separated list.) 5x^2e^(−2x) − 3x^3e^(−2x) = 0

38. chemistry

How many grams of NiI2 are there in 263 grams of an aqueous solution that is 33.5 % by weight NiI2.

39. chemistry

How many grams of NaOH are there in 187 grams of an aqueous solution that is 7.06 % by weight NaOH.

Which of the following statements about the money invested in a traditional IRA account is correct? A.it isn't taxed until it's withdrawn. B.it's subject to double taxation. C.it's taxed as you make deposits. D.it isn't taxed.

41. Physics

How can you tell which force diagrams have a strong normal force and which ones have a weak normal force?

42. math

solve for sine theta of 3.14/3

43. Chemistry

I'm trying to figure out the formula for one liter of 1M K2HPO4 (Potassium Phosphate Dibasic). I know the amount of K2HPO4 is 174.18grams and you make it to equal one liter with dH2O, but I can't find where anyone has actually written the amount of dH2O to

44. history

how has "liberty and justice for all" changes from 1492 to 1865? may include race, class, religion, politics, gender, economics, culture

45. physics

a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the

46. chemistry

when you add manganese dioxide to hydrogen peroxide does the temperature decrease or does it form a precipitate?

47. English

What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.

48. Language

Are these two sentences complete or incomplete? A large red fox with its young. A day sunbathing on the beach.

49. PRECALC

4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)-f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)

50. precalc

Solve the equation. (Enter your answers as a comma-separated list. Round your answers to four decimal places.) 2^x − 8(2^−x) + 2 = 0

51. precalc

2^(3x + 1) = 3^(x − 2) (a) Find the exact solution of the exponential equation in terms of logarithms.

52. physics

how do you plot T2 2.14, 2.10, 2.08, 2.03, 2,20 and 2.30 and length .445, .54m, .497m, .50m, .53m and .555m on a graph and how do you find the gradient

53. grammar

directions: rewrite the 2 sentences as 1 sentence by combining the main verbs and helping verbs...The carriage has crossed the bridge. The carriage has arrived at the mansion.

54. physics

if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00

55. AAT

ã3tanx=3tanxcscx-ã3tanx

56. Functions of f(x)

Given the two functions f(x)and g(x)‚0 for all x, explain how to find (f+g)(x),(f-g)(x),(f*g)(x), and (f€g)(x).Demonstrate examples for all: f(x)=(-x)/(6)-3(5+3x)/(8)-3x f(0)=-15/8

57. literature

summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.

58. Science

how long does it take for one water molecule to complete the water cycle?

59. english

Where should the commas be placed in this sentence? Players came from places such as Red Hill Pennsylvania and Popular Point Manitoba Canada.

1. English

Who else is gonna fail the 8th grade

posted on April 29, 2019
2. ELA

lie

posted on January 7, 2019
3. Language Arts urgent!!

hi

posted on September 17, 2018
4. Language Arts

Part A: A Part B: B 2: C Typing Question:???? 4: C 5: B 6: B 7: B 8: A Typing Question:???? If you go to my school you cannot get help on the typing questions because you have to compare your independent reading selection!! 100/100 I Prommise....!

posted on December 4, 2017
5. Taylor

hv

posted on September 1, 2016
6. physics

32

posted on August 31, 2015
7. English

All of these are ways to correct comma splices, run-ons, and fused sentences except A. join two independent clauses with a coordinating conjunction. B. separate the two clauses with a period. C. join two independent clauses with a subordinating

posted on January 12, 2015
8. algebra

x=150 electric tower

posted on December 15, 2014
9. science pls help

posted on October 13, 2014
10. Public speaking

no 2 is B

posted on April 29, 2014
11. public speaking

D is wrong

posted on April 29, 2014
12. grammar

The carriage has crossed the bridge and arrived at the mansion. The carriage crossed the bridge and has arrived at the mansion. ???

posted on December 10, 2013

Number 8 is D

posted on November 22, 2013
14. Physics

please help me if you can. I have no values, just diagrams. the first diagram: a box is attached to a rope and pulled along a floor with the rope parallel to the floor. The second diagram: a box is attached to a rope and pulled along a floor with the rope

posted on September 25, 2012
15. Physics

well I have 3 diagrams and I'm supposed to rank them in order of strongest normal force to weakest normal force, so I'm just not sure how to tell which is the strongest.

posted on September 24, 2012
16. AAT

those are supposed to be square root symbols. I'm not sure what happened...

posted on April 8, 2012
17. Chemistry

Thank you so much! Another question, the directions say, Determine the [H3O] and [OH] of each of the following solutions. Lime Juice, pH= 1.9 Kitchen Cleaner, pOH= 4.75 Tomato Juice, pH= 4.23 How do I do this?

posted on April 4, 2012
18. Chemistry

I think i figured it out, would the pH be .9?

posted on April 4, 2012
19. Chemistry

hi DrBob222, thanks for your help. I understand that part, but how do you solve it using only the molarity?

posted on April 4, 2012
20. statistics

38

posted on November 15, 2011
21. history

thanks really just trying to get my thesis statement straightened out its a very broad subject

posted on May 9, 2011
22. English

Casual Wear is popular with American teenagers for sure.

posted on March 30, 2011
23. Science

Thank you, J-B-

posted on March 7, 2011
24. Science

posted on March 7, 2011
25. Science and acrostic poems

ooo ya

posted on January 26, 2011
26. english

posted on January 20, 2010
27. Algebra

Great explanation. I totally get it now. I think I can actually finish the rest. Thanks for your help!

posted on November 13, 2009
28. PreCalc (Just Can't Comprehend)

If P = 2x + 2y and xy=400, then the perimeter is P(x)=2x + 800/x. In a pre-calc course you could only be expected to find the minimum value of P(x) by inspection of a graph. See the "graph of p = 2x + 800/x from 0 to 40" at wolfram alpha. OR, by creativity

posted on November 5, 2009
29. English

Calm Thank you for your help

posted on October 23, 2009
30. Physics EM

Physics2212 students... lets all protest against mastering physics.

posted on October 20, 2009
31. science

CellTheory

posted on April 14, 2009
32. social studies

Britain I believe

posted on May 7, 2008